package com.nowcoder.community.controller;

import com.google.code.kaptcha.Producer;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.RedisKeyUtil;
import jakarta.annotation.Resource;
import jakarta.servlet.ServletOutputStream;
import jakarta.servlet.http.Cookie;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.core.Authentication;
import org.springframework.security.web.authentication.logout.SecurityContextLogoutHandler;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.thymeleaf.util.MapUtils;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @author bombax
 * @date 2024-07-14 21:17
 */
@Controller
public class LoginController {
    private static final Logger logger = LoggerFactory.getLogger(LoginController.class);

    @Resource
    private UserService userService;

    @Resource
    private Producer kaptchaProducer;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @Resource
    private RedisTemplate redisTemplate;

    @Resource
    private SecurityContextLogoutHandler securityContextLogoutHandler;

    @GetMapping("/register")
    public String getRegisterPage() {
        return "site/register";
    }

    @GetMapping("/login")
    public String getLoginPage() {
        return "site/login";
    }

    @PostMapping("/register")
    public String register(Model model, User user) {
        Map<String, Object> map = userService.register(user);
        if (MapUtils.isEmpty(map)) {
            model.addAttribute("msg", "注册成功，我们已经向您的邮箱发送了一封激活邮件，请尽快激活!");
            model.addAttribute("target", "/index");
            return "site/operate-result";
        } else {
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            model.addAttribute("emailMsg", map.get("emailMsg"));
            return "site/register";
        }
    }

    // http://localhost:8080/community/activation/101/code
    @GetMapping("/activation/{userId}/{code}")
    public String activation(Model model, @PathVariable("userId") Integer userId, @PathVariable("code") String code) {
        Integer result = userService.activation(userId, code);
        if (result.equals(CommunityConstant.ACTIVATION_SUCCESS)) {
            model.addAttribute("msg", "激活成功，您的账号已经可以正常使用了!");
            model.addAttribute("target", "/login");
        } else if (result.equals(CommunityConstant.ACTIVATION_REPEAT)) {
            model.addAttribute("msg", "无效操作，该账号已经激活过了！");
            model.addAttribute("target", "/index");
        } else if (result.equals(CommunityConstant.ACTIVATION_FAILURE)) {
            model.addAttribute("msg", "注册失败，您提供的激活码不正确!");
            model.addAttribute("target", "/index");
        }
        return "site/operate-result";
    }

    /* @GetMapping("/kaptcha")
    public void getKaptcha(HttpServletResponse response, HttpSession session) {
        // 生成验证码
        String text = kaptchaProducer.createText();
        BufferedImage image = kaptchaProducer.createImage(text);
        // 将验证码存入session
        session.setAttribute("kaptcha", text);
        // 将图片输出给浏览器
        response.setContentType("image/jpeg");
        try {
            ServletOutputStream os = response.getOutputStream();
            ImageIO.write(image, "png", os);
        } catch (IOException e) {
            logger.error("响应验证码失败：", e);
        }
    } */

    @GetMapping("/kaptcha")
    public void getKaptcha(HttpServletResponse response) {
        // 生成验证码
        String text = kaptchaProducer.createText();
        BufferedImage image = kaptchaProducer.createImage(text);
        // 将验证码存入session
//        session.setAttribute("kaptcha", text);

        // 验证码的归属
        String kaptchaOwner = CommunityUtil.generateUUID();
        Cookie cookie = new Cookie("kaptchaOwner", kaptchaOwner);
        cookie.setMaxAge(60);
        cookie.setPath(contextPath);
        response.addCookie(cookie);
        // 将验证码存入 Redis
        String kaptchaKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
        redisTemplate.opsForValue().set(kaptchaKey, text, 60, TimeUnit.SECONDS);

        // 将图片输出给浏览器
        response.setContentType("image/jpeg");
        try {
            ServletOutputStream os = response.getOutputStream();
            ImageIO.write(image, "png", os);
        } catch (IOException e) {
            logger.error("响应验证码失败：", e);
        }
    }

    /* @PostMapping("/login")
    public String login(String username, String password, String code, Boolean rememberme,
                        Model model, HttpSession session, HttpServletResponse response) {
        // 1. 检查验证码
        String kaptcha = (String) session.getAttribute("kaptcha");
        if (StringUtils.isBlank(kaptcha) || StringUtils.isBlank(code) || !kaptcha.equalsIgnoreCase(code)) {
            model.addAttribute("codeMsg", "验证码不正确!");
            return "site/login";
        }
        // 2. 检查账号、密码
        Integer expiredSeconds = rememberme != null ? CommunityConstant.REMEMBER_EXPIRED_SECOND : CommunityConstant.DEFAULT_EXPIRED_SECOND;
        Map<String, Object> map = userService.login(username, password, expiredSeconds);
        if (map.containsKey("ticket")) {
            Cookie cookie = new Cookie("ticket", map.get("ticket").toString());
            cookie.setPath(contextPath);
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);
            return "redirect:/index";
        } else {
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            return "site/login";
        }
    } */

    @PostMapping("/login")
    public String login(String username, String password, String code, Boolean rememberme,
                        Model model, HttpServletResponse response,
                        @CookieValue(name = "kaptchaOwner", required = false) String kaptchaOwner) {
        // 1. 检查验证码
//        String kaptcha = (String) session.getAttribute("kaptcha");
        String kaptcha = null;
        if(StringUtils.isNoneBlank(kaptchaOwner)){
            String kaptchaKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
            kaptcha = (String) redisTemplate.opsForValue().get(kaptchaKey);
        }
        if (StringUtils.isBlank(kaptcha) || StringUtils.isBlank(code) || !kaptcha.equalsIgnoreCase(code)) {
            model.addAttribute("codeMsg", "验证码不正确!");
            return "site/login";
        }
        // 2. 检查账号、密码
        Integer expiredSeconds = rememberme != null ? CommunityConstant.REMEMBER_EXPIRED_SECOND : CommunityConstant.DEFAULT_EXPIRED_SECOND;
        Map<String, Object> map = userService.login(username, password, expiredSeconds);
        if (map.containsKey("ticket")) {
            Cookie cookie = new Cookie("ticket", map.get("ticket").toString());
            cookie.setPath(contextPath);
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);
            return "redirect:/index";
        } else {
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            return "site/login";
        }
    }

    @GetMapping("/logout")
    public String logout(@CookieValue("ticket") String ticket, HttpServletRequest request, HttpServletResponse response, Authentication authentication) {
        userService.logout(ticket);
        securityContextLogoutHandler.logout(request, response, authentication);
        return "redirect:/login";
    }
}
